Dyfyniad APA

Duggal, K. N. (1983). Elements of public health engineering (3rd.). S. Chand.

Dyfyniad Arddull Chicago

Duggal, K. N. Elements of Public Health Engineering. 3rd. New Delhi: S. Chand, 1983.

Dyfyniad MLA

Duggal, K. N. Elements of Public Health Engineering. 3rd. S. Chand, 1983.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.